Dr. med. Othmar Keller studied human medicine at Ludwig-Maximilian University of Munich from 1982-1988. In 1990 he started his residency as MD for ophthalmology at the Clinic for Ophthalmology of the Technical University Rechts der Isar, then switched to the Clinic for Ophthalmology of the University of Munich. In the interim period a study visit to Moorfields Eyehospital London, Department of Electrodiagnostics took place to complement his study background.
In May 1995 he passed his examination as medical specialist for ophthalmology according to Bayerische Landesärztekammer and since then has been working as a resident ophthalmologist starting in 1997, first in the district of Weilheim Schongau, then in the district of Starnberg, and now at Herrsching at lake Ammersee. Besides consultation hours at his practice, his focus lies on eye surgery of the front eye section, cataract and glaucoma surgery, refractive surgery and laser surgery.